Same symptoms. Had to kill -15 the process and then do a restart to
get things back on track. Only started to hang like this after I
enabled GrowlSafari. Here's my sample:

Analysis of sampling GrowlHelperApp (pid 53080) every 1 millisecond
Call graph:
    7866 Thread_25776971   DispatchQueue_1: com.apple.main-thread
(serial)
      7866 start
        7866 main
          7866 -[GrowlApplication run]
            7866 -[NSApplication run]
              7866 -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:]
                7866 _DPSNextEvent
                  7866 BlockUntilNextEventMatchingListInMode
                    7866 ReceiveNextEventCommon
                      7866 RunCurrentEventLoopInMode
                        7866 CFRunLoopRunSpecific
                          7866 __CFRunLoopRun
                            7866
WebCore::MainResourceLoader::handleDataLoadNow(WebCore::RunLoopTimer<WebCore::MainResourceLoader>*)
                              7866
WebCore::MainResourceLoader::didReceiveResponse(WebCore::ResourceResponse
const&)
                                7866
WebCore::MainResourceLoader::continueAfterContentPolicy(WebCore::PolicyAction)
                                  7866
WebCore::MainResourceLoader::continueAfterContentPolicy(WebCore::PolicyAction,
WebCore::ResourceResponse const&)
                                    7866
WebCore::MainResourceLoader::didFinishLoading()
                                      7866
WebCore::FrameLoader::finishedLoading()
                                        7866
WebCore::FrameLoader::recursiveCheckLoadComplete()
                                          7866
WebCore::FrameLoader::checkLoadCompleteForThisFrame()
                                            7866
WebFrameLoaderClient::dispatchDidFinishLoad()
                                              7866
CallFrameLoadDelegate(objc_object* (*)(objc_object*,
objc_selector*, ...), WebView*, objc_selector*, objc_object*)
                                                7866 -
[GrowlWebKitWindowController webView:didFinishLoadForFrame:]
                                                  7391 -
[GrowlPositionController positionDisplay:]
                                                    3914
NSIntersectsRect
                                                    3288 -
[GrowlPositionController positionDisplay:]
                                                    189 NSContainsRect
                                                  459
dyld_stub_NSIntersectsRect
                                                  16
dyld_stub_NSContainsRect
    7866 Thread_25776973   DispatchQueue_2: com.apple.libdispatch-
manager  (serial)
      7866 start_wqthread
        7866 _pthread_wqthread
          7866 _dispatch_worker_thread2
            7866 _dispatch_queue_invoke
              7866 _dispatch_mgr_invoke
                7865 kevent
                1 _dispatch_run_timers
                  1 _dispatch_wakeup
                    1 _dispatch_queue_push_list_slow
                      1 _dispatch_wakeup
                        1 _dispatch_queue_push_list_slow
                          1 _dispatch_wakeup
                            1 _dispatch_queue_wakeup_global
                              1 pthread_workqueue_additem_np
                                1 pick_nextworkqueue_droplock
                                  1 __workq_kernreturn
    7866 Thread_25777012
      7866 thread_start
        7866 _pthread_start
          7866 __NSThread__main__
            7866 -[NSConnection run]
              7866 CFRunLoopRunSpecific
                7866 __CFRunLoopRun
                  7866 mach_msg
                    7866 mach_msg_trap
    7866 Thread_25777013
      7866 thread_start
        7866 _pthread_start
          7866 __CFSocketManager
            7866 select$DARWIN_EXTSN
    7866 Thread_25777802: JavaScriptCore: FastMalloc scavenger
      7866 thread_start
        7866 _pthread_start
          7866 WTF::TCMalloc_PageHeap::runScavengerThread(void*)
            7866 WTF::TCMalloc_PageHeap::scavengerThread()
              7866 sleep
                7866 nanosleep
                  7866 __semwait_signal
    7866 Thread_25777803
      7866 thread_start
        7866 _pthread_start
          7866 __NSThread__main__
            7866 +[NSURLConnection(NSURLConnectionReallyInternal)
_resourceLoadLoop:]
              7866 CFRunLoopRunSpecific
                7866 __CFRunLoopRun
                  7866 mach_msg
                    7866 mach_msg_trap
    7067 Thread_25880080
      7067 start_wqthread
        7066 _pthread_wqthread
          7066 __workq_kernreturn
        1 start_wqthread
    799 Thread_25777794
      799 start_wqthread
        799 _pthread_wqthread
          799 __workq_kernreturn

Total number in stack (recursive counted multiple, when >=5):

Sort by top of stack, same collapsed (when >= 5):
        mach_msg_trap        15732
        __semwait_signal        7866
        __workq_kernreturn        7866
        select$DARWIN_EXTSN        7866
        kevent        7865
        NSIntersectsRect        3914
        -[GrowlPositionController positionDisplay:]        3288
        dyld_stub_NSIntersectsRect        459
        NSContainsRect        189
        dyld_stub_NSContainsRect        16

Piko

On Jan 23, 9:58 pm, "Mr. Dashiell Michael Barlow"
<[email protected]> wrote:
> Heya
>
>         Once again, had a Growl issue where I had Growl using 95+% of a 
> processor core. This time, I had zero notifications up (as opposed to 1/3 of 
> a 13" screen with smallish notifications) up, and more refused to show up, 
> from Adium or iTunes (GrowlTunes).
>
>         Process sample is attached.
>
>         Stoping / Restarting from Growl prefpane had zero effect. Force quit 
> from Activity Monitor on GrowlHelperApp and then a start from prefpane 
> reversed my issue. (For the moment anyway).
>
>                 -- Dash
>
> ----
> Signed,
> Mr. Dashiell Michael Barlow
> Life & Sanity

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